Improved medicine-dropper



P. J. McELRDY.

Medicine Dropper.

No. 79,487. Patented June 30, 1868.

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".PEI'ERS. PNOTO-LITNOGRAPHER,-WASHINGTON. D C.

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Letters Patent No. 79,487, dated June 30, 1868- IMPROVED MBDIGINE-DROPPER.

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TO ALL WHOM IT MAY CONCERN: 7

Be it known that I, PATRICK J. McELRoY, of Cambridge, in the county of Middlesex, and Stateof'Massnchusetts, have invented an Improved Medicine-Dropper; and I do hereby declare that the following, taken in connection with the drawings which accompany and form partof this specification, is a. description of my invention suificient to enable those skilled in the art to practise it.

In taking or administering liquid medicine, tobe measured in drops, it is well knou'n that it is'very difi icult and often impossible to drop the medicine with accuracy, onaccount of unsteadiness of the hand or unskillfulness, and the object of myinvention is to remedy this trouble, by the construction-and employment of a self-dropping device, which takes up the liquid from the bottle-and drops it slowly and alc ourotely in distinct and uniform drops.

My invention consists in a tube, (preferably made of glass,) to be attached to the bottle-cork or stopper, this tube being closed at top and controctedot bottom, :y d hnving a, minute air-hole through its side near the top.

The drawings represent a drop-tube embodying my improvement.

A shows the'tube within a bottle.

B, a, view of it removed fromfthe bottle.

a. denotes the bottle, containing medicine or other liquid, 6. c is the neck of the bottle, ondd the cork or stopper. -2: denotes the drop-containing and delivering-tube, haying its upper end inserted'lor driven into the bottom of the-stopper, as seen at A.

The glass tube is preferably mode. hermetically close at top, though amo'peu-top tube maybe used, said top being closed by the covering portion of the stopper.

The tube is made of thin gloss, or with a, large bore, in proportion to its diameter, end atits lowerend the glass is drawn down, so as to leave but a. very small discharge-orifice, f, and near the top of the tube, or so as to come just below the cork, or above the liquid contents oi the bottle, when nearly filled, is a very small airinlet, g.

The tube being so made and appliedto a. stopper, (when the tube and stopper ere inse'rtedin a. vial containing liquid, the liquid will rise to the same height irfthe tube as in thevinl,-the fluid enteringorificef, (as by pressure it drives nir from orifice 9,) and in this condition ofthings themouth of the viitl isseeuroly closed by the stopper, precisely as if the droptube me not employed, t v I I When the medicine is to be taken, the stopper is drowufrom the bottle, and-t tiith it the tube 6, which, being held over a spoon or cup, the liquid will exude fromthe orificef, indr'ops, and the droppingmay be arrested, when desirable, or regulated, by placingthe end of a finger over the air-inlet g.

B this means medicine or other liquid may be taken from a bottle in dropgby unsteady hands, and with-- out skill. v

I claim a, tube, for dropping medicine or other liquid, constructed substentially asend for the purpose described.

' PATRICK J. MoELROY] Witnesses: c

J. B. CnosBr, FRANCIS GouLD. 

